Sun is center of our solar system. All other planets revolve around sun.Our earth get energy from the sun.We all live because of sun’s rays.But have you thought how sun is formed?Its not complex.
There are many particles in universe.Its a fact that our universe is made up of mostly positive particles. But there are some negative particles too. They just move in some random direction.If a positive particle comes in contact with negative particle they will just vanish. As per the law ‘Energy can neither be created nor be destroyed.’ So if a positive and negative particle collide, the whole energy is transformed into a weight. So it will start to pull all other particles near its surroundings. Its a natural phenomenon. Because of this it creates an atmosphere around itself. This action repeats. It starts to gather a hell lot of particles around it. It is a small single cell on which the whole pressure resides.As the pressure grows, it will compress all particles towards center. After some years the whole thing looks really big. The pressure will be building, as the pressure increases it produces heat. if you keep on pressing your thumb against some wall or anyother substance for a certain amount of time, you will feel the heat. The same principle is applied here. Heat keeps on increasing. so Fission happens and sun is formed.
The whole thing happens in some million years. Its the nature of pressure to force all particles towards the center. Whereas the heat formed during this compression makes particles to expand. At certain threshold both will be same. The pressure applied will be same as the heat that is generated. Only at this threshold a sun can remail stable. If not so the all the energy will be used up and it will transform into a black hole.So for any object to be stable there is a threshold which must be stable.
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